[v10.0.x] docs: add default value workaround (#73003)

docs: add default value workaround (#72545)

* Update _index.md

Fixes #https://github.com/grafana/support-escalations/issues/6376

Variables : Added Default values

* Update docs/sources/dashboards/variables/_index.md

Co-authored-by: Isabel <76437239+imatwawana@users.noreply.github.com>

* Ran prettier to resolve build errors

---------

Co-authored-by: Isabel <76437239+imatwawana@users.noreply.github.com>
Co-authored-by: Isabel Matwawana <isabel.matwawana@grafana.com>
Co-authored-by: Jack Baldry <jack.baldry@grafana.com>
(cherry picked from commit 54f0de313f)

Co-authored-by: arunkg2787 <131352769+arunkg2787@users.noreply.github.com>
This commit is contained in:
grafana-delivery-bot[bot]
2023-08-07 12:48:56 -04:00
committed by GitHub
co-authored by arunkg2787
parent a570d080c9
commit bf0730b35f
@@ -63,3 +63,6 @@ The following dashboards in Grafana Play provide examples of template variables:
- Variable drop-down lists are displayed in the order they are listed in the variable list in Dashboard settings.
- Put the variables that you will change often at the top, so they will be shown first (far left on the dashboard).
- By default, variables don't have a default value. This means that the topmost value in the drop-down is always preselected. If you want to pre-populate a variable with an empty value, you can use the following workaround in the variable settings:
1. Select the **Include All Option** checkbox.
2. In the **Custom all value** field, enter a value like `+`.